Based on recent research advances in stratigraphy, sedimentary environment, magmavolcanic petrology, structural geology and geochemistry, the Qinling Orogenic Belt can be individed into 13 main tectonic units as follows. ① Slope Sequences in the southern margin of North China block include the lower sequence made up of Later Proterozoic Dazhuang and Luoquan formations and Cambrian , and the upper sequence of the Ordovician Taowan Group. ② Northern Back Arc Complex is constructed of mafic volcanic blocks and metafine sandstones in the Kuanping and Erlangping groups. ③ Accretionary Arc Complex in the Northern Qinling is comprised of arc calcalkalic volcanic rocks in the Paleozoic Yunjiashan, Xieyuguan, Caotangou, Liziyuan and Luohansi groups, different oceanic highs in the Danfeng Group, arc basement in the Qinling Goup, maficultra mafic magma complex in the fore arc at Fushui and metaabyssal sediments. Its formation duration is from Ordovician to Carboniferous. ④ Northern Fore Arc Basins in the Middle Qinling are characterized by the Divonian fills and other upper Paleozoic sediments, with syndeposition faults controlling a series of secondary basins. ⑤ Accretionary Complex zone in South Qinling is recognized by matrix and blocks. The matrix is mainly composed of mudy and sandy slates containing Permian microfossils. The blocks include Proterozoic to palezoic mafic, ultramafic volcanic rocks and limestone blocks. ⑥ Southern Arc Complex, Bikou arc is defined by mafic, intermediate and acidic volcanic rocks of Bikou Group and magmatic rocks; Xixiang Arc by mafic and intermediate volcanic rocks in the Sanhuashi Group and intermediate and acidic volcanic rocks in the Xixiang Group; and Ankang Arc is by volcanic rocks from basic to acidic in the Yunxi and Yaolinghe groups. The three arcs were produced during late Paleozoic. ⑦ Southern Fore arc basins The fillings in the Bikou forearc are sediments of the Hengdan and Guanjiagou groups; Xixiang fore arc sediments contain metamorphic turbidites and acidic volcanic rocks of the Sanhuashi Group; and the strata of the Ankang fore arc are the Meiziya Group and Daguiping Formation with sediments in deep sea fans. ⑧ Southern Back arc complexes consist mainly of Maoxian Group and Upper Paleozoic and Trassic in Longmenshan, and minor basic volcanic complex of the Donghe Group in Dabashan. ⑨ Continental slope of back arc basin retain only Lower Paleozoic in Dabashan. ⑩ Foreland Thrust Fold Belts include Northern Longmenshan, Micangshan and Dabashan belts. The strata formed in Triassic and Jurassic, and structural boundary lines from west to east become newer. B11Triassic remnant sea basin. B12 Mesozoic and Cenozoic faulted basins and B13basement bocks.